package acs.udp;

import java.util.List;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.socket.DatagramPacket;
import io.netty.handler.codec.MessageToMessageDecoder;
import io.netty.util.CharsetUtil;

public class LogEventDecoder extends MessageToMessageDecoder<DatagramPacket> {
	@Override
	protected void decode(ChannelHandlerContext ctx, DatagramPacket datagramPacket, List<Object> out) throws Exception {
		ByteBuf data = datagramPacket.content();
		int idx = data.indexOf(0, data.readableBytes(), LogEvent.SEPARATOR);
		String filename = data.slice(0, idx).toString(CharsetUtil.UTF_8);
		String logMsg = data.slice(idx + 1, data.readableBytes()).toString(CharsetUtil.UTF_8);
		LogEvent event = new LogEvent(datagramPacket.sender(), System.currentTimeMillis(), filename, logMsg);
		out.add(event);
	}
}
